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Enhanced seal for a spark plug
PATENTS
PATENTS Enhanced seal for a spark plug Applicant: Federal-Mogul Ignition Co, USA An electrically conductive glass seal has been developed for providing a hermetic bond between an electrically conductive component and an insulator of a spark plug. The seal that is described is formed by mixing glass frits, binder, an expansion agent and electrically conductive metal particles. The glass frits may include silica (SiO2), boron oxide (B2O3), aluminium oxide (AI2O3), bismuth oxide (Bi2O3) and zinc oxide (ZnO). The binder may include sodium bentonite or magnesium aluminium silicate, polyethylene glycol (PEG) and dextrin, whilst the expansion agent may include lithium carbonate. The electrically conductive particles may include copper. The finished seal includes the glass in a total amount of 50.0–85.0 wt%, and the electrically conductive metal particles in an amount of 15.0–50.0 wt% (based on the total weight of the glass seal). Patent number: WO/2016/025379 Inventors: K. Firstenberg and W. Walker Publication date: 18 February 2016
Sealing structure Applicant: NOK Corp, Japan This invention covers a sealing structure that enables a side lip to function even when an inward-facing flange portion of a reinforcing ring is short, and enables a labyrinth structure to be created between an oil seal and a torsional vibration damper. The seal body (120) consists
of a side lip (124), which extends from near the tip of an inward-facing flange portion (112) in a radially inward direction and towards the air side (A) of a dust lip (122), to a position not reaching the outer circumferential surface of a tubular portion (210). The design of the seal body is characterised by the use of an annular member (250), which is affixed, on the air side (A) of the side lip, to the outer circumferential surface of the tubular portion, and which covers the outer circumferential surface such that a gap is formed with respect to the outer circumferential surface of the side lip (124). Patent number: WO/2016/027696 Inventors: Y. Kamiya, H. Matsui, S. Omoto and T. Nakashima Publication date: 25 February 2016
Shaping tool and method for producing a seal on a component part Applicant: Henkel Ag & Co Kgaa, Germany This invention relates to a method for producing a seal on a component part, using a specific shaping tool. As part of the process described by this patent, a UV-hardening sealing material is used as the material for the seal and the shaping tool has a top side and a bottom side. It also has at least one cavity – open towards the bottom side – that is filled with the sealing material. The shaping tool is composed of a UV-permeable material. When in use the sealing material is introduced into the cavity of the shaping tool. The component part is placed on the bottom side of the tool “containing” the sealing material, and is pressed onto the tool. The sealing material is them hardened by UV irradiation. The tool is removed from the component part and the seal.
This invention covers a sealing structure that allows a side lip to function even when an inward-facing flange portion of a reinforcing ring is short, and enables a labyrinth structure to be created between an oil seal and a torsional vibration damper. Patent WO/2016/027696 contains further details.
12
Sealing Technology
Patent number: WO/2016/026704 Inventors: J. Becher and M. Drexl Publication date: 25 February 2016
Seal ring Applicant: Knorr-Bremse Systeme für Nutzfahrzeuge GmbH, Germany This patent provides details of a seal ring (106) for axially sealing two parts (102 & 104) arranged so that they are able to move axially with respect to one another. The seal ring has two sealing lips that are arranged circumferentially on an axial, first, end-side of the seal ring (106). In this context, the sealing lips are designed such that they can be spread apart (from one another) by the pressure of a first fluid volume to bear, in a sealing manner, against mutually opposing sealing faces of the first (102) of the parts. The seal ring (106) also has a sealing projection, which is arranged circumferentially on a second, end-side of the seal ring (106) – oriented axially away from the first, end-side. In that context, the sealing projection is designed to seal – when in a state bearing against a sealing surface of the second (104) of the parts – the first fluid volume in a region (132) arranged radially inwards with respect to the sealing projection against a second fluid volume at a second fluid pressure in a region (134) arranged radially outwards with respect to the sealing projection. Patent number: WO/2016/026949 Inventors: Z. Csoma and D. Jakab Publication date: 25 February 2016
Patent WO/2016/026949 provides details of a seal ring (106) for axially sealing two parts (102 & 104) arranged so that they are able to move axially with respect to one another. The figure above shows a sectional view of the sealing system according to one embodiment of this patent.
January 2017
PATENTS Enhanced seal for a spark plug Applicant: Federal-Mogul Ignition Co, USA An electrically conductive glass seal has been developed for providing a hermetic bond between an electrically conductive component and an insulator of a spark plug. The seal that is described is formed by mixing glass frits, binder, an expansion agent and electrically conductive metal particles. The glass frits may include silica (SiO2), boron oxide (B2O3), aluminium oxide (AI2O3), bismuth oxide (Bi2O3) and zinc oxide (ZnO). The binder may include sodium bentonite or magnesium aluminium silicate, polyethylene glycol (PEG) and dextrin, whilst the expansion agent may include lithium carbonate. The electrically conductive particles may include copper. The finished seal includes the glass in a total amount of 50.0–85.0 wt%, and the electrically conductive metal particles in an amount of 15.0–50.0 wt% (based on the total weight of the glass seal). Patent number: WO/2016/025379 Inventors: K. Firstenberg and W. Walker Publication date: 18 February 2016
Sealing structure Applicant: NOK Corp, Japan This invention covers a sealing structure that enables a side lip to function even when an inward-facing flange portion of a reinforcing ring is short, and enables a labyrinth structure to be created between an oil seal and a torsional vibration damper. The seal body (120) consists
of a side lip (124), which extends from near the tip of an inward-facing flange portion (112) in a radially inward direction and towards the air side (A) of a dust lip (122), to a position not reaching the outer circumferential surface of a tubular portion (210). The design of the seal body is characterised by the use of an annular member (250), which is affixed, on the air side (A) of the side lip, to the outer circumferential surface of the tubular portion, and which covers the outer circumferential surface such that a gap is formed with respect to the outer circumferential surface of the side lip (124). Patent number: WO/2016/027696 Inventors: Y. Kamiya, H. Matsui, S. Omoto and T. Nakashima Publication date: 25 February 2016
Shaping tool and method for producing a seal on a component part Applicant: Henkel Ag & Co Kgaa, Germany This invention relates to a method for producing a seal on a component part, using a specific shaping tool. As part of the process described by this patent, a UV-hardening sealing material is used as the material for the seal and the shaping tool has a top side and a bottom side. It also has at least one cavity – open towards the bottom side – that is filled with the sealing material. The shaping tool is composed of a UV-permeable material. When in use the sealing material is introduced into the cavity of the shaping tool. The component part is placed on the bottom side of the tool “containing” the sealing material, and is pressed onto the tool. The sealing material is them hardened by UV irradiation. The tool is removed from the component part and the seal.
This invention covers a sealing structure that allows a side lip to function even when an inward-facing flange portion of a reinforcing ring is short, and enables a labyrinth structure to be created between an oil seal and a torsional vibration damper. Patent WO/2016/027696 contains further details.
12
Sealing Technology
Patent number: WO/2016/026704 Inventors: J. Becher and M. Drexl Publication date: 25 February 2016
Seal ring Applicant: Knorr-Bremse Systeme für Nutzfahrzeuge GmbH, Germany This patent provides details of a seal ring (106) for axially sealing two parts (102 & 104) arranged so that they are able to move axially with respect to one another. The seal ring has two sealing lips that are arranged circumferentially on an axial, first, end-side of the seal ring (106). In this context, the sealing lips are designed such that they can be spread apart (from one another) by the pressure of a first fluid volume to bear, in a sealing manner, against mutually opposing sealing faces of the first (102) of the parts. The seal ring (106) also has a sealing projection, which is arranged circumferentially on a second, end-side of the seal ring (106) – oriented axially away from the first, end-side. In that context, the sealing projection is designed to seal – when in a state bearing against a sealing surface of the second (104) of the parts – the first fluid volume in a region (132) arranged radially inwards with respect to the sealing projection against a second fluid volume at a second fluid pressure in a region (134) arranged radially outwards with respect to the sealing projection. Patent number: WO/2016/026949 Inventors: Z. Csoma and D. Jakab Publication date: 25 February 2016
Patent WO/2016/026949 provides details of a seal ring (106) for axially sealing two parts (102 & 104) arranged so that they are able to move axially with respect to one another. The figure above shows a sectional view of the sealing system according to one embodiment of this patent.
January 2017